Push-drill.



" PATENTED JUNEG, 17905.'

Z. T. PURBISH.Y PUSH DRILL. APPLITIN FILED S'IEPT. 22, 1903.

' UNITED. STATES Patented June 6, 1905. I

,PATENT OFFICE.

zACHRY T. FURBI'SH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR To NORTHBROTHERS MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, ACORPORATION vOF PENNSYLVANIA..

PUSH-DRILL.

SPECIFICATION forming part f Letters Patent No. 791,767, 'dated June 6,1905.

i Application iledSeptember-ZZ, 1903. .Serial No. 174,211.

To @ZZ whm it may concern.; f Be it known that I, ZACHRY T. FURRISH, a

citizen ofthe United States, residing in Phila-y IO according to thesize of drill used and the character of material to be drilled. In apending application for patent, filed on the 12th day of September,1903, Serial No. 172.9410, I have claimed, broadly, a push'- I drillhaving means for adjusting the spring, while the present inventionrelates to means located at the handle e'nd of the tool for adjustingthe spring.

In the accompanying drawings, Figure 1 is 2O a side view of my improvedpush-drill. Fig. 2 is a longitudinal sectional View. Fig. 3 is atransverse sectional View on the line 3 3, Fig. 2. Fig. 4s is atransverse sectional View on the line 4 f1, Fig. 2. Fig. 5 is atransverse sectional View on the line 5 5, Fig. 2. Fig. 6 is aperspeotiveview of the adjusting-screw. Fig. 7 is a sectionalperspective View of the handle, showing the magazine; and Fig. 8 is asectional perspective View of the cap. 'A is the handle of thepush-drill, and mounted on the end of the handle is a magazine-sec-ltion A', having a head A2, which is screwed rto the end of the tubewhich forms lthe hane. B is a carrier arranged to slide and turn in thehandle A. A'portion of the carrier is screw-threaded, and the screwmeshes with a nut a2, secured to the handle, so that when pressure isplaced upon the `'handle the car- 40 rier will be turned. At the outerend of the carrier in the present instance is a chuck A spring D extendsthrough the carrier and into the handle and rests against a nut 0l on ascrew-stem D. The nut 0l has a spline d3, which enters a slot e in atube E, secured to the head A2. The screw-stem D' has its bearing in thehead A2 and is secured to a cap d2,

so that on vturning the cap the screw will be turned, causing the nut dto travel, either compressing the spring or allowing it to expand.

The magazine A has a number of compartments a for the drills. Thesecompartments are-.formed by radial partitions, as shown in Figs; 3 and4L. One of the compartments is 55 lled with agrooved block, in whichslides a bolt I, extending to the cap @Z2 and' entering one of a seriesof holes in the cap. Aflanged ring f forms the bottom of thecompartments a of the magazine and is supported by a spring F, whichrests against a washer r1 in the end of the handle. The washer enters anotch in the bolt I, so that the spring acts to force the bolt into theholes in the cap d2. When the bolt is withdrawn, the washer rocks, andas soon as the bolt is released the spring acts to throw the bolt. y

Sliding on the handle A is a cap-ring I-I, which forms a closure for themagazine, as shown in Fig. 2. This cap-ring has a portion 7o l2., whichextends into the magazine. and has a screw-threaded portion L, on whichis a lianged nut Between the liange of the nut and the end of the cap isa spring-ring ha.

Out in the handle A is an annular groove, into which the ring h3 isforced by screwing up the nut when it is wished to' fasten the capring Hin position closing the magazine. As soon as the nut is backed off thering will spring out of the groove and release the cap, 8O so that itcan be withdrawn from the magazine sufliciently to allow the drills tobe projected by the spring F to enable any one of the drills to beremoved. Other means of fastening the cap-ring to the'handle may be 85employed without departing from the main feature of my invention.

When it is wished to drill soft material or use a small drill, the nutis backed olI by turning the cap at the end of the handle so that 9 thespring is under very little tension; but when a large drill is used orhard material is to be drilled then the Vnut is forced against thespring by turning the cap until the spring ing into the handle, a screwextendingifrom. the handle into the spring, a nut on the screw,.

means for preventing the nut turning, and a cap secured'to the screw andby which itis turned to adjust the nut longitudinally, `suzbI-fYstantially as described.

SLQThe combination of a=handle,.a carrier mountedain..thefhandle, a==nut onv the handle and a screw-thread on theicarrier soV that when thehandle is reciprocated the carrier wil-l be turned, a springmounted inthe carrier-'and extending into the handle, a. screw projecting from thehandle, .a-cap secured. to the. screw forming` they end ofY the handle,`a nut; on` the screw, a slotted tube engaging they nuit so, that whenthe-screw is turned the nut will move longitudinally; and adjust thespring, substantially as; described.

4:. Thecombi-nation in afpushz-.dri'lL of alian-4 dle, a carrier,aspringresting against the caririer,.ascrew mountedin the handle of thedrill,and a cap; on: the handle, to which the screw is attached so thaton turning the cap 6. The combination of a handle, a screw- 45stemmounted therein, a cap secured to the screw-stem, a carrier, aspring, a nut on the screw -stem, a bolt for locking the cap, a washerin the handle engaging the bolt, and a spring b'earing'against thewasher, suhstan- 50 `tially as described.

7. The combination of` a handle, a screws stem-.mounted therein, a, capisecured-to the stem,-l ancarrier; a spring, annuton the screw` stem, .amagazine surrounding the handlewJ ring on; the handle forming thefbottom.of .the magazine, a bolt forl locking` the cap t0 .the handle, a washerinthe handle engagingthe bolt, and .aspring'mounted in they handle between: the ring land the. washer, substantial ly as described.`

In testimony whereof I havesigned my name tothis specificationv in thepresence of two subscribing witnesses;-

ZACHRY T. FURBISHJ` Witnesses:

WILL. A; BARR-, Jos.- H. KLEIN'.

